What Paris has done right is to make it awful to get around by car and awfully easy to get around by public transportation or by bike. Any tourist in a rent-a-car who’s circumnavigated the Arc de Triomphe most likely will never drive in Paris again. But there are plenty of Parisians who do it all the time — far too many, in fact. So Mayor Bertrand Delanoë, a Socialist, vowed in coming to office in 2001 to reduce car traffic by 40 percent by 2020...

In short, public transportation will take you where you want to go, and you can use it all you want on an electronic card that can be paid by the week or by the month (about $70 these days). Taxis, of course, can also be summoned anywhere by phone...

Mayor Delanoë’s latest front in the anti-car war is the bicycle. Last week, more than 10,000 stolid, gray-painted bicycles (no Tour de France speedsters) became available for rent at 750 self-service locations across Paris. The cost is modest... and the bikes can be dropped off at any docking station. The number of bikes is supposed to double by the end of the year. Already in their first week, the bikes are all over central Paris, many carrying commuters — and, yes, some New Yorkers.